oork "bark, forms a cell, pupates and finally transforms to 

 the acUilt. On the advent of h<">t weather in June or July it 

 emerges, leaving an elliptical e.^it hole. This species of 

 Melanophila seems to be the most destructive of the genus to 

 pines, although many other f lathe ad species produce nearly 

 the same looking galleries and exit holes. The larva has a 

 flat, wide head, is about 1 inch !<">ng when full grown, with 

 the body distinctly nannwer than the head, tapering toward 

 the posterior. 



In the north it becomes primary in attacking young 

 growth. Trees so attacked present a sazekly appearance, but 

 often take two years to die. The species also breeds in limbs 

 and all fresh down material, and is to be found associated wifi 

 other species on a large percentage of dying trees. It does 

 not enter the wood, but mines the inner layers of the bark, 

 finally pupating in the bark plates. The full grown larvae, 

 pupae and adults may often be found in the bark plates by 

 slicing them with an ax. In June and July the adult beetle 

 may be seen running swiftly over the boles of standing trees 

 nr windfalls. 



D3EDHOGTONUS JEFffr.F.YI , POPK. 



(The Jeffrey Pine Beetle.) 

 Hosts - Jeffrey and yellow pine. 



Although this beetle is sometimes found in yellow 



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